title: Microstructured-core photonic-crystal fiber for ultra-sensitive refractive index sensing.
abstract: We propose a novel photonic crystal fiber refractive index sensor which is based on the selectively resonant coupling between a conventional solid core and a microstructured core. The introduced microstructured core is realized by filling the air-holes in the core with low index analyte. We show that a detection limit (DL) of 2.02×10⁻⁶ refractive index unit (RIU) and a sensitivity of 8500 nm/RIU can be achieved for analyte with refractive index of 1.33.
authors.affiliation: Department of Optical Engineering, School of Mechanical Engineering, Jiangsu University, Jiangsu Province, China.
authors.forename: Bing
authors.initials: B
authors.lastname: Sun
authors.forename: Ming-Yang
authors.initials: MY
authors.lastname: Chen
authors.forename: Yong-Kang
authors.initials: YK
authors.lastname: Zhang
authors.forename: Ji-Chang
authors.initials: JC
authors.lastname: Yang
authors.forename: Jian-quan
authors.initials: JQ
authors.lastname: Yao
authors.forename: Hai-Xia
authors.initials: HX
authors.lastname: Cui
mesh_terms: D003460:Crystallization; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D008420:Manufactured Materials; D012031:Refractometry / Q000295:instrumentation*; D014159:Transducers